April 2016 DocID029239 Rev 1 1/17

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AN4862 Application note

STEVAL-IFP032V1 evaluation board for the VNI8200 octal high side driver

Introduction The STEVAL-IFP032V1 is an evaluation board for the IPS VNI8200XP and VNI8200XP-32 monolithic 8-channel high side drivers featuring very low supply current, an integrated SPI interface and a high efficiency 100 mA micropower step-down switching regulator. Only the 0.7 A for VNI8200XP and 1.2 A for VNI8200XP-32 operating current differentiates the two.

The STEVAL-IFP032V1 provides a 4-row, 2-column LED matrix to signal the status of each output line. The LED matrix is supplied by the step-down regulator integrated in the VNI8200 devices. The same integrated regulator supplies the external high-speed optocouplers, which provide the isolated interface required by industrial standards between the IPS and the host controller.

The four-layer structure of the board with dedicated copper areas on each layer improves the distribution of power dissipation, for optimized thermal performance.

The STEVAL-IFP032V1 meets EFT standard requirements IEC 61000-4-2, IEC 61000-4-4 and IEC 61000-4-5.

The STEVAL-IFP032V1 can be controlled via a dedicated, user-friendly GUI for Windows operating systems when a STEVAL-PCC009V2 communication board is connected between the evaluation board and the PC.

Figure 1: STEVAL-IFP032V1 evaluation board

Contents AN4862

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Contents

1 Features .......................................................................................... 3

2 Evaluation board characteristics .................................................. 4

3 PCB layout ...................................................................................... 7

3.1 Power section ................................................................................... 9

3.2 Step-down converter ........................................................................ 9

3.3 Digital interface .............................................................................. 10

3.3.1 Parallel interface .............................................................................. 10

3.3.2 SPI communication .......................................................................... 10

3.4 Thermal management .................................................................... 10

3.5 EMC robustness ............................................................................. 10

4 PC communication using STEVAL-PCC009V2 connection and HSD GUI interface ................................................................................. 11

5 Bill of material ............................................................................... 12

6 Reference documents .................................................................. 15

7 Revision history ........................................................................... 16

AN4862 Features

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1 Features

Operating voltage from 10.5 to 33 V

Operating current: 1.2 A

Reverse polarity protection

High speed opto-isolation for SPI and parallel communication

Low speed opto-isolation for device fault signaling

Step-down converter for 3.3 V or 5 V

Digital supply voltage

LED matrix for channel status signaling

Microcontroller interface

Designed to meet EMC standard requirements: IEC 61000-4-2, IEC 61000-4-4, and IEC 61000-4-5

Evaluation board characteristics AN4862

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2 Evaluation board characteristics Figure 2: Schematic diagram - interface section

AN4862 Evaluation board characteristics

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Figure 3: Schematic diagram - power section

Evaluation board characteristics AN4862

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Table 1: "STEVAL-IFP032V1 connector and jumper description" summarizes the board connectors and jumpers for device driving.

Table 1: STEVAL-IFP032V1 connector and jumper description

Name Type Function

J6 Drop jumper Drop jumper to select parallel or SPI

interface

CN2 Digital supply External 3.3 - 5 V supply

CN1 Power supply Supply voltage

JP2,JP3,JP4,JP5,JP6 Drop jumpers Drop jumper to select external reference or

microcontroller driving

JP7 Drop jumper DC-DC disable

JP8 Drop jumper DC-DC 5 V regulation

CN3 Power outputs Device power outputs

CN4 30-pin connector Microcontroller interface

Table 2: STEVAL-IFP032V1 30-pin signal connector description

Pin number Description

1 3.3 V communication board digital output voltage

2 GND reference

3 Parallel Input pin IN1

4 Parallel input pin IN2

5 Parallel input pin IN3

6 Parallel input pin IN4

7-12 NC

13 GND reference

14 Vdd

15 SPI device data out/parallel input 8

16 SPI CLK/ parallel input 6

17 SPI device data in/parallel input 5

18 Chip select/parallel input 7

19 Fault feedback for improper communication or thermal junction protection

intervention

20 Power Good feedback

21 Thermal case feedback information

22 Not used

23 NC

24,25 Reserved

26,27 NC

28 GND reference

29,30 NC

AN4862 PCB layout

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3 PCB layout Figure 4: STEVAL-IFP032V1: component placement

Figure 5: STEVAL-IFP032V1: top side layout

PCB layout AN4862

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Figure 6: STEVAL-IFP032V1 internal layer 1

Figure 7: STEVAL-IFP032V1 internal layer 2

AN4862 PCB layout

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Figure 8: STEVAL-IFP032V1: bottom side layout

3.1 Power section

Set the main voltage between 18 and 33 V to avoid overheating of the Transil diode due to high reverse voltage. A digital supply voltage may be provided via the on-board DC-DC converter or the CN2 connector. This evaluation board also provides reverse polarity protection through a Schottky diode and surge protection through a Transil diode with 45 V clamp voltage.

Table 3: STEVAL-IFP032V1 electrical specifications (recommended values)

Parameter Description Test Condition Typ Unit

VCC Main supply voltage 24 V

Vreg Digital voltage supply 5 V

IVcc Current consumption

DC-DC OFF Vreg = 5 V SPI OFF channel

OFF 5 mA

DC-DC ON Vreg = 5 V SPI ON channel OFF 15 mA

Vclamp Supply voltage clamp 48 V

Rth Thermal resistance 15 °C/W

3.2 Step-down converter

The step-down converter is designed to generate a regulated 3.3 V/5 V voltage for internal circuitry, the optocoupler and other VNI8200 devices (by bypassing diode D1) if necessary.

To set regulated voltage, open drop jumper JP8 for 3.3 V regulation and close it for 5 V regulation.

To turn on or turn off the DC-DC converter, close JP7 on the appropriate side; moreover, in case of 3.3 V regulation, jumper JP12 must be closed. The regulated voltage can be measured at test point TP1.

PCB layout AN4862

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3.3 Digital interface

The STEVAL-IFP032V1 allows device driving with a maximum 4.5 MHz parallel or synchronous communication through a 30-pin connector. The steps required to manage the evaluation tool are described below.

3.3.1 Parallel interface

To select the parallel interface, the drop jumper JP6 should be left open, whereas JP10 has to be soldered on the side identified with the label “IN8”.

After this, you can manage all signals for parallel communication through the 30-pin connector. In parallel configuration, the input pin connected to drop jumpers JP2, JP4, JP5 and JP3 can be managed by a microcontroller or kept fixed to a reference.

By leaving the drop jumpers open, the corresponding input is pulled down, while soldering on the other reference it is possible to always have a high input or provide a square wave at different periods for a WD signal.

3.3.2 SPI communication

For SPI communication, close jumper JP6 and solder jumpers JP10 and JP9 on the side with the “SDO” label.

In this mode, the watchdog reset function is available.

This functionality can be controlled by a microcontroller by soldering drop jumpers JP3 and JP4 on side with the “µC” label, or controlled externally by soldering JP3 and JP4 on the opposite side, fixing these signals to another reference.

The above also applies to drop jumpers “OUT_EN” and “SEL1”.

3.4 Thermal management

Thermal management is facilitated by distributing power dissipation on VCC over four layers. This solution allows an Rth of 15 °C/W with an approximate 16 cm² copper area on the bottom layer and 6 cm² on the other layers. The copper thickness is 70 µm.

3.5 EMC robustness

The STEVAL-IFP032V1 satisfies all IEC 61000-4-2, IEC 61000-4-4, and IEC 61000-4-5 requirements for ESD (air discharge and contact discharge), burst on outputs and supply line and surge tests on output and supply line respectively.

AN4862 PC communication using STEVAL-PCC009V2 connection and HSD GUI interface

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4 PC communication using STEVAL-PCC009V2 connection and HSD GUI interface

This evaluation board has a 30-pin connector which can be used to interface with the STEVAL-PCC009V2 board, which allows communication and driving of the STEVAL-IFP032V1 board in parallel and serial mode via GUI interface.

Figure 9: GUI interface SPI 16-bit communication

Figure 10: GUI interface parallel communication

Bill of material AN4862

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5 Bill of material Table 4: Bill of material - interface section

Components Description Type Part number Manufacturer

C1, C2, C3, C4,

C5 100 nF/10 V Ceramic SMT 0603 GRM188R71H104JA93D Murata

C6 NC Ceramic SMT 0603 GRM188R71H104JA93D Murata

J1 CON30 30-pin connector

J2 IN8 Drop jumper

J3 SDO Drop jumper

R1, R2, R3, R4,

R5, R6, R7, R8,

R9, R10, R11,

R12, R13, R14,

R15, R17

150R Resistor

R16 12K4 Resistor

R23, R24, R25, 4K7 Resistor

R26 NC Resistor

R18 18K2 Resistor

R19 27K4 Resistor

R20 11K3 Resistor

R21 0R Resistor

R22 0R Resistor

R27, R28, R29 350R Resistor

U1, U2, U3, U4 ACPL-K73L-

000E Optocoupler SMD ACPL-K73L-000E

Avago

Technologies

U5 ACPL- W070L-

000E Optocoupler SMD ACPL-W070L-000E

Avago

Technologies

U6 TLP281 Optocoupler SMD TLP281-4 Toshiba

Table 5: Bill of material - power section

Components Description Type Part number Manufacturer

D4, D5, D6, D7,

D8, D9, D10, D11 Green LED LED SMD

C7 100 µF/50 V Electrolytic

capacitor EEEFP1H101AP Panasonic

C8, C9 4.7 nF Y1 /

4 kV 500 Vac Ceramic single layer VY1472M63Y5UQ6*V0 Vishay

C15 1 µF/50 V Ceramic SMT GRM31MR71H105KA88L Murata

C10 1 µF/50 V Ceramic

C11, C12, C13,

C14, C16, 100 pF/10 V Ceramic

C17 3.3 pF/10 V Ceramic

AN4862 Bill of material

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Components Description Type Part number Manufacturer

C18, C19, C21,

C23, C24, C25,

C26, C27, C28

22 nF/50 V Ceramic

C20, C29, C30 4.7 pF/10 V Ceramic

C22 100 nF/10 V Ceramic

C31 4.7 µF/10 V Ceramic SMT GRM21BR71A475KA73L Murata

C32, C33, C34 10 nF/10 V Ceramic

C35 100 pF/50 V Ceramic

D1, D3 STPS1L60A Schottky diode SMD ST

D2 STPS1H100A Schottky diode SMD ST

D12, D13, D14 RED LED LED SMD

CN2 Extreg 2-way screw

connector

CN1 VCC 2-way screw

connector

JP2 OUT_EN Drop jumper

JP3 WD Drop jumper

JP4 WD_EN Drop jumper

JP5 SEL1 Drop jumper

JP6 SEL2 Drop jumper

CN3 CON8 8-way screw

connector

J8 5 V Drop jumper

J7 DC-DC Drop jumper

JP11 GND_DISC Drop jumper

JP12 3V3 Drop jumper

L1 100 µH/0.7R

Is > 700 mA Inductor LQH6PPN101M43L Murata

R30, R32, R34,

R36, R38, R46,

R47, R48, R49

10 k Resistor

R31, R33, R35,

R37, R39, 270R Resistor

R40, R41, R42,

R43 100R Resistor

R56 8 k Resistor

R44 10 k 1% Resistor

R45 1k47 1% Resistor

R50 2k37 1% Resistor

R51, R52 115R Resistor

R53, R54, R55 470R Resistor

R57 33 k Resistor

TP1 Vreg Test point 1 mm

Bill of material AN4862

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Components Description Type Part number Manufacturer

TP2 SDI Test point 1 mm

TP3 CLK Test point 1 mm

TP4 SS Test point 1 mm

TP5 SDO Test point 1 mm

TP7 WD Test point 1 mm

TRS1 SM15T33CA Transil ST

U7 VNI8200XP-32 ST

AN4862 Reference documents

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6 Reference documents

VNI8200XP-32 datasheet

IEC 61000-4-4 standard

IEC 61000-4-5 standard

IEC 61000-4-2 standard

Revision history AN4862

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7 Revision history Table 6: Document revision history

Date Revision Changes

27-Apr-2016 1 Initial release.

AN4862

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